I have used Binance, OKex, gate.io, huobipro, Bibox, Exx.
It's so sorry to say that all of them has a problem like you just said.
The most annoying thing i met is in the Exx. I want to sell my BitcoinCash, about 0.5467 while the 0.0007 can not be sold, that means you will lost the 0.0009 BCC! I contact them to report this problem. They told me to deposit some another BCC to make a deal.......
I think we should get together to report this problem. This related to our money!